Add schema to the 200 response

Author: Arsheen Khatib

specification/network/resource-manager/Microsoft.Network/stable/2023-11-01/networkVirtualAppliance.json

@@ -325,7 +325,10 @@
         ],
         "responses": {
           "200": {
-            "description": "Request successful. The operation restarts one or more Network Virtual Appliance VM resources."
+            "description": "Request successful. The operation restarts one or more Network Virtual Appliance VM resources.",
+            "schema": {
+              "$ref": "#/definitions/NetworkVirtualApplianceInstanceIds"
+            }
           },
           "202": {
             "description": "Request successful. The operation restarts one or more Network Virtual Appliance VM resources.",